  html,
  body {
      height: 100%;
  }

  body {
      padding-top: 45px;
      padding-bottom: 50px;
  }

  .lt_header {
      position: fixed;
      top: 0;
      background-color: #f60;
      width: 100%;
      height: 45px;
      text-align: center;
      color: #fff;
      padding: 10px;
      .lt_tltle {
          position: relative;
          .lt_h_right {
              position: absolute;
              right: 0;
              top: 0;
              color: #fff;
          }
          .lt_h_left {
              position: absolute;
              top: 0;
              left: 0;
              color: #fff;
          }
      }
  }

  .lt_footer {
      position: fixed;
      width: 100%;
      height: 50px;
      background-color: cornflowerblue;
      bottom: 0;
      z-index: 100;
      text-align: center;
      padding-top: 6px;
      >a {
          float: left;
          width: 25%;
          color: #fff;
          font-size: 14px;
          >p {
              color: inherit;
              font-size: 15px;
          }
          >span {
              font-size: 20px;
          }
      }
      .active {
          color: orange;
      }
      .it_UL() {
          margin: 0;
          padding: 0;
          list-style: none;
      }
  }